Structure and magnetic properties of TbFe6-xGa6+x compounds
The TbFe6-xGa6+x compounds (x=0，0.5，1.0 and 1.45)have been prepared and studied by X-ray powder diffraction and magnetization measurements．The structure of the compound TbFe6-xGa6+x transfers from the orthorhombic ScFe6Ga6-type structure(space group Immm)(x=0 and 0.5)to the tetragonal ThMn12type structure(space group 14/mmm)(x=1.0 and 1.5)and the volume of the unit cell increases as Ga content increases．The lattice parameters are a=0.85550.b=0.8626 and C =0.50717 nm for TbFe6Ga6，and a=0.86672，and c=0.50900 nm for TbFe4.55Ga7.45.The magnetization measurements indicate all the TbFe6-xGa6+x compounds have magnetic ordering．The Curie temperatures decrease from 492 K for TbFe6Ga6 to 327 K for TbFe4.55Ga7.45 The magnetization of the TbFe6-xGa6+x decreases with temperature due to the mutually compensating effect of the R-and Fe-sublattice magnetizations below its magnetic ordering temperature．
金属间化合物 晶体结构 磁序 磁性化合物
J.Q.Li M.Ouyang F.S.Liu D.C.Liu W.Q.Ao
College ofMaterials Science and Engineering,Shenzhen University and Shenzhen Key Laboratory of Special FunctionaI Materias,Shenzhen 518060,PR China
国内会议
长沙
英文
60-65
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）